2 * Copyright (c) 2007 Marcel Moolenaar
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
32 #include <sys/disklabel.h>
33 #include <sys/endian.h>
34 #include <sys/kernel.h>
36 #include <sys/limits.h>
38 #include <sys/malloc.h>
39 #include <sys/mutex.h>
40 #include <sys/queue.h>
42 #include <sys/systm.h>
43 #include <sys/sysctl.h>
44 #include <geom/geom.h>
45 #include <geom/part/g_part.h>
47 #include "g_part_if.h"
49 #define BOOT1_SIZE 512
50 #define LABEL_SIZE 512
51 #define BOOT2_OFF (BOOT1_SIZE + LABEL_SIZE)
52 #define BOOT2_SIZE (BBSIZE - BOOT2_OFF)
54 FEATURE(geom_part_bsd, "GEOM partitioning class for BSD disklabels");
56 struct g_part_bsd_table {
57 struct g_part_table base;
62 struct g_part_bsd_entry {
63 struct g_part_entry base;
64 struct partition part;
67 static int g_part_bsd_add(struct g_part_table *, struct g_part_entry *,
68 struct g_part_parms *);
69 static int g_part_bsd_bootcode(struct g_part_table *, struct g_part_parms *);
70 static int g_part_bsd_create(struct g_part_table *, struct g_part_parms *);
71 static int g_part_bsd_destroy(struct g_part_table *, struct g_part_parms *);
72 static void g_part_bsd_dumpconf(struct g_part_table *, struct g_part_entry *,
73 struct sbuf *, const char *);
74 static int g_part_bsd_dumpto(struct g_part_table *, struct g_part_entry *);
75 static int g_part_bsd_modify(struct g_part_table *, struct g_part_entry *,
76 struct g_part_parms *);
77 static const char *g_part_bsd_name(struct g_part_table *, struct g_part_entry *,
79 static int g_part_bsd_probe(struct g_part_table *, struct g_consumer *);
80 static int g_part_bsd_read(struct g_part_table *, struct g_consumer *);
81 static const char *g_part_bsd_type(struct g_part_table *, struct g_part_entry *,
83 static int g_part_bsd_write(struct g_part_table *, struct g_consumer *);
84 static int g_part_bsd_resize(struct g_part_table *, struct g_part_entry *,
85 struct g_part_parms *);
87 static kobj_method_t g_part_bsd_methods[] = {
88 KOBJMETHOD(g_part_add, g_part_bsd_add),
89 KOBJMETHOD(g_part_bootcode, g_part_bsd_bootcode),
90 KOBJMETHOD(g_part_create, g_part_bsd_create),
91 KOBJMETHOD(g_part_destroy, g_part_bsd_destroy),
92 KOBJMETHOD(g_part_dumpconf, g_part_bsd_dumpconf),
93 KOBJMETHOD(g_part_dumpto, g_part_bsd_dumpto),
94 KOBJMETHOD(g_part_modify, g_part_bsd_modify),
95 KOBJMETHOD(g_part_resize, g_part_bsd_resize),
96 KOBJMETHOD(g_part_name, g_part_bsd_name),
97 KOBJMETHOD(g_part_probe, g_part_bsd_probe),
98 KOBJMETHOD(g_part_read, g_part_bsd_read),
99 KOBJMETHOD(g_part_type, g_part_bsd_type),
100 KOBJMETHOD(g_part_write, g_part_bsd_write),
104 static struct g_part_scheme g_part_bsd_scheme = {
107 sizeof(struct g_part_bsd_table),
108 .gps_entrysz = sizeof(struct g_part_bsd_entry),
110 .gps_maxent = 20, /* Only 22 entries fit in 512 byte sectors */
111 .gps_bootcodesz = BBSIZE,
113 G_PART_SCHEME_DECLARE(g_part_bsd);
116 bsd_parse_type(const char *type, uint8_t *fstype)
122 if (type[0] == '!') {
123 lt = strtol(type + 1, &endp, 0);
124 if (type[1] == '\0' || *endp != '\0' || lt <= 0 || lt >= 256)
129 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_NANDFS);
130 if (!strcasecmp(type, alias)) {
134 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP);
135 if (!strcasecmp(type, alias)) {
139 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS);
140 if (!strcasecmp(type, alias)) {
144 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM);
145 if (!strcasecmp(type, alias)) {
149 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS);
150 if (!strcasecmp(type, alias)) {
158 g_part_bsd_add(struct g_part_table *basetable, struct g_part_entry *baseentry,
159 struct g_part_parms *gpp)
161 struct g_part_bsd_entry *entry;
162 struct g_part_bsd_table *table;
164 if (gpp->gpp_parms & G_PART_PARM_LABEL)
167 entry = (struct g_part_bsd_entry *)baseentry;
168 table = (struct g_part_bsd_table *)basetable;
170 entry->part.p_size = gpp->gpp_size;
171 entry->part.p_offset = gpp->gpp_start + table->offset;
172 entry->part.p_fsize = 0;
173 entry->part.p_frag = 0;
174 entry->part.p_cpg = 0;
175 return (bsd_parse_type(gpp->gpp_type, &entry->part.p_fstype));
179 g_part_bsd_bootcode(struct g_part_table *basetable, struct g_part_parms *gpp)
181 struct g_part_bsd_table *table;
182 const u_char *codeptr;
184 if (gpp->gpp_codesize != BOOT1_SIZE && gpp->gpp_codesize != BBSIZE)
187 table = (struct g_part_bsd_table *)basetable;
188 codeptr = gpp->gpp_codeptr;
189 bcopy(codeptr, table->bbarea, BOOT1_SIZE);
190 if (gpp->gpp_codesize == BBSIZE)
191 bcopy(codeptr + BOOT2_OFF, table->bbarea + BOOT2_OFF,
197 g_part_bsd_create(struct g_part_table *basetable, struct g_part_parms *gpp)
199 struct g_provider *pp;
200 struct g_part_entry *baseentry;
201 struct g_part_bsd_entry *entry;
202 struct g_part_bsd_table *table;
204 uint32_t msize, ncyls, secpercyl;
206 pp = gpp->gpp_provider;
208 if (pp->sectorsize < sizeof(struct disklabel))
210 if (BBSIZE % pp->sectorsize)
213 msize = MIN(pp->mediasize / pp->sectorsize, UINT32_MAX);
214 secpercyl = basetable->gpt_sectors * basetable->gpt_heads;
215 ncyls = msize / secpercyl;
217 table = (struct g_part_bsd_table *)basetable;
218 table->bbarea = g_malloc(BBSIZE, M_WAITOK | M_ZERO);
219 ptr = table->bbarea + pp->sectorsize;
221 le32enc(ptr + 0, DISKMAGIC); /* d_magic */
222 le32enc(ptr + 40, pp->sectorsize); /* d_secsize */
223 le32enc(ptr + 44, basetable->gpt_sectors); /* d_nsectors */
224 le32enc(ptr + 48, basetable->gpt_heads); /* d_ntracks */
225 le32enc(ptr + 52, ncyls); /* d_ncylinders */
226 le32enc(ptr + 56, secpercyl); /* d_secpercyl */
227 le32enc(ptr + 60, msize); /* d_secperunit */
228 le16enc(ptr + 72, 3600); /* d_rpm */
229 le32enc(ptr + 132, DISKMAGIC); /* d_magic2 */
230 le16enc(ptr + 138, basetable->gpt_entries); /* d_npartitions */
231 le32enc(ptr + 140, BBSIZE); /* d_bbsize */
233 basetable->gpt_first = 0;
234 basetable->gpt_last = msize - 1;
235 basetable->gpt_isleaf = 1;
237 baseentry = g_part_new_entry(basetable, RAW_PART + 1,
238 basetable->gpt_first, basetable->gpt_last);
239 baseentry->gpe_internal = 1;
240 entry = (struct g_part_bsd_entry *)baseentry;
241 entry->part.p_size = basetable->gpt_last + 1;
242 entry->part.p_offset = table->offset;
248 g_part_bsd_destroy(struct g_part_table *basetable, struct g_part_parms *gpp)
250 struct g_part_bsd_table *table;
252 table = (struct g_part_bsd_table *)basetable;
253 if (table->bbarea != NULL)
254 g_free(table->bbarea);
255 table->bbarea = NULL;
257 /* Wipe the second sector to clear the partitioning. */
258 basetable->gpt_smhead |= 2;
263 g_part_bsd_dumpconf(struct g_part_table *table, struct g_part_entry *baseentry,
264 struct sbuf *sb, const char *indent)
266 struct g_part_bsd_entry *entry;
268 entry = (struct g_part_bsd_entry *)baseentry;
269 if (indent == NULL) {
270 /* conftxt: libdisk compatibility */
271 sbuf_printf(sb, " xs BSD xt %u", entry->part.p_fstype);
272 } else if (entry != NULL) {
273 /* confxml: partition entry information */
274 sbuf_printf(sb, "%s<rawtype>%u</rawtype>\n", indent,
275 entry->part.p_fstype);
277 /* confxml: scheme information */
282 g_part_bsd_dumpto(struct g_part_table *table, struct g_part_entry *baseentry)
284 struct g_part_bsd_entry *entry;
286 /* Allow dumping to a swap partition or an unused partition. */
287 entry = (struct g_part_bsd_entry *)baseentry;
288 return ((entry->part.p_fstype == FS_UNUSED ||
289 entry->part.p_fstype == FS_SWAP) ? 1 : 0);
293 g_part_bsd_modify(struct g_part_table *basetable,
294 struct g_part_entry *baseentry, struct g_part_parms *gpp)
296 struct g_part_bsd_entry *entry;
298 if (gpp->gpp_parms & G_PART_PARM_LABEL)
301 entry = (struct g_part_bsd_entry *)baseentry;
302 if (gpp->gpp_parms & G_PART_PARM_TYPE)
303 return (bsd_parse_type(gpp->gpp_type, &entry->part.p_fstype));
308 g_part_bsd_resize(struct g_part_table *basetable,
309 struct g_part_entry *baseentry, struct g_part_parms *gpp)
311 struct g_part_bsd_entry *entry;
313 entry = (struct g_part_bsd_entry *)baseentry;
314 baseentry->gpe_end = baseentry->gpe_start + gpp->gpp_size - 1;
315 entry->part.p_size = gpp->gpp_size;
321 g_part_bsd_name(struct g_part_table *table, struct g_part_entry *baseentry,
322 char *buf, size_t bufsz)
325 snprintf(buf, bufsz, "%c", 'a' + baseentry->gpe_index - 1);
330 g_part_bsd_probe(struct g_part_table *table, struct g_consumer *cp)
332 struct g_provider *pp;
334 uint32_t magic1, magic2;
339 /* Sanity-check the provider. */
340 if (pp->sectorsize < sizeof(struct disklabel) ||
341 pp->mediasize < BBSIZE)
343 if (BBSIZE % pp->sectorsize)
346 /* Check that there's a disklabel. */
347 buf = g_read_data(cp, pp->sectorsize, pp->sectorsize, &error);
350 magic1 = le32dec(buf + 0);
351 magic2 = le32dec(buf + 132);
353 return ((magic1 == DISKMAGIC && magic2 == DISKMAGIC)
354 ? G_PART_PROBE_PRI_HIGH : ENXIO);
358 g_part_bsd_read(struct g_part_table *basetable, struct g_consumer *cp)
360 struct g_provider *pp;
361 struct g_part_bsd_table *table;
362 struct g_part_entry *baseentry;
363 struct g_part_bsd_entry *entry;
364 struct partition part;
367 u_int sectors, heads;
371 table = (struct g_part_bsd_table *)basetable;
372 msize = MIN(pp->mediasize / pp->sectorsize, UINT32_MAX);
374 table->bbarea = g_read_data(cp, 0, BBSIZE, &error);
375 if (table->bbarea == NULL)
378 buf = table->bbarea + pp->sectorsize;
380 if (le32dec(buf + 40) != pp->sectorsize)
382 sectors = le32dec(buf + 44);
383 if (sectors < 1 || sectors > 255)
385 if (sectors != basetable->gpt_sectors && !basetable->gpt_fixgeom) {
386 g_part_geometry_heads(msize, sectors, &chs, &heads);
388 basetable->gpt_sectors = sectors;
389 basetable->gpt_heads = heads;
392 heads = le32dec(buf + 48);
393 if (heads < 1 || heads > 255)
395 if (heads != basetable->gpt_heads && !basetable->gpt_fixgeom)
396 basetable->gpt_heads = heads;
398 chs = le32dec(buf + 60);
401 /* Fix-up a sysinstall bug. */
404 le32enc(buf + 60, msize);
407 basetable->gpt_first = 0;
408 basetable->gpt_last = msize - 1;
409 basetable->gpt_isleaf = 1;
411 basetable->gpt_entries = le16dec(buf + 138);
412 if (basetable->gpt_entries < g_part_bsd_scheme.gps_minent ||
413 basetable->gpt_entries > g_part_bsd_scheme.gps_maxent)
416 table->offset = le32dec(buf + 148 + RAW_PART * 16 + 4);
417 for (index = basetable->gpt_entries - 1; index >= 0; index--) {
418 p = buf + 148 + index * 16;
419 part.p_size = le32dec(p + 0);
420 part.p_offset = le32dec(p + 4);
421 part.p_fsize = le32dec(p + 8);
422 part.p_fstype = p[12];
424 part.p_cpg = le16dec(p + 14);
425 if (part.p_size == 0)
427 if (part.p_offset < table->offset)
429 if (part.p_offset - table->offset > basetable->gpt_last)
431 baseentry = g_part_new_entry(basetable, index + 1,
432 part.p_offset - table->offset,
433 part.p_offset - table->offset + part.p_size - 1);
434 entry = (struct g_part_bsd_entry *)baseentry;
436 if (index == RAW_PART)
437 baseentry->gpe_internal = 1;
443 printf("GEOM: %s: invalid disklabel.\n", pp->name);
444 g_free(table->bbarea);
445 table->bbarea = NULL;
450 g_part_bsd_type(struct g_part_table *basetable, struct g_part_entry *baseentry,
451 char *buf, size_t bufsz)
453 struct g_part_bsd_entry *entry;
456 entry = (struct g_part_bsd_entry *)baseentry;
457 type = entry->part.p_fstype;
458 if (type == FS_NANDFS)
459 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_NANDFS));
461 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP));
462 if (type == FS_BSDFFS)
463 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS));
464 if (type == FS_VINUM)
465 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM));
467 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS));
468 snprintf(buf, bufsz, "!%d", type);
473 g_part_bsd_write(struct g_part_table *basetable, struct g_consumer *cp)
475 struct g_provider *pp;
476 struct g_part_entry *baseentry;
477 struct g_part_bsd_entry *entry;
478 struct g_part_bsd_table *table;
480 u_char *label, *p, *pe;
484 table = (struct g_part_bsd_table *)basetable;
485 baseentry = LIST_FIRST(&basetable->gpt_entry);
486 label = table->bbarea + pp->sectorsize;
487 for (index = 1; index <= basetable->gpt_entries; index++) {
488 p = label + 148 + (index - 1) * 16;
489 entry = (baseentry != NULL && index == baseentry->gpe_index)
490 ? (struct g_part_bsd_entry *)baseentry : NULL;
491 if (entry != NULL && !baseentry->gpe_deleted) {
492 le32enc(p + 0, entry->part.p_size);
493 le32enc(p + 4, entry->part.p_offset);
494 le32enc(p + 8, entry->part.p_fsize);
495 p[12] = entry->part.p_fstype;
496 p[13] = entry->part.p_frag;
497 le16enc(p + 14, entry->part.p_cpg);
502 baseentry = LIST_NEXT(baseentry, gpe_entry);
505 /* Calculate checksum. */
506 le16enc(label + 136, 0);
507 pe = label + 148 + basetable->gpt_entries * 16;
509 for (p = label; p < pe; p += 2)
511 le16enc(label + 136, sum);
513 error = g_write_data(cp, 0, table->bbarea, BBSIZE);